stale-while-revalidate

The stale-while-revalidate attribute is used by the Cache-Control header and defines an extra window of time during which a cache (proxy, user agents) can use a stale asset while it revalidates it asynchronously. This improves subsequent page load latencies as stale assets are non longer in the critical path.

Specification

Working draft or equivalent

Status in Chromium

Blink components: Blink

Enabled by default (tracking bug) in:

Chrome for desktop release 75
Chrome for Android release 75
Android WebView release 75

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

Firefox: No public signals
Edge: Mixed public signals
Safari: No public signals
Web Developers: Positive

Owners

kenjibaheux@chromium.org
dtapuska@chromium.org

Intent to Implement url

Intent to Implement thread

Last updated on 2019-03-15